Composite poppet valve and process of making the same



mm M 1924. LEM-# R. J-ARDINE;

COMPOSITE FOPPET' VALVE AND'PROCESS OF MAKING THE' SAME Filed Sept. 13,, 1 22' 1,, I 2 I III Patented Oct. '14, 19214.

ROBERT JARDINE,

O'E CHICAGO, ILLINOIS, ASSIGNOR TO RICH 'IOOL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

COMPOSITE POPIPET VALVE AND PROCESS OF MAKING THE SAME.

Application filed September 13, 1922. Serial No. 587,994.

To all whom it may concern:

Be it known that l, Bonner JARDINE, a citizen of the United States, and resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful improvements in Composite Poppet Valves and Processes of Making the Same, of which the following is a specificatiomand which are illustrated in the accompanying drawings, forming a part thereof.

The invention relatesto poppet valves for gas engines, and especially to those wherein different materials are employed for dilferent parts of the valve. The invention is not, however, concerned with the particular character of the materials employed, but rather with the form in which they are provided and the manner in which they are associated. Nevertheless, in practicing the inven tion the materials employed for the different parts of the valve may, and preferably will, be asspecified in one or the other or my pending applications for patent on gas engine valves, filed August 8, 1821, Serial Numbers 19 l,521 and $90,522.

The object of the invention is to provide an improved composite valve and method of manufacturing the same, wherein the material employed for the rim or seating portion of the valve is used in a form which is readily obtainable without waste, easily applied, and firmly incorporated with the remainder of the valve.

In the accompanying drawings:

Fig. 1 is a side elevation, partly in section, and Fig. 2 a central sectional view, showing the two parts from which the improved valve may be produced, the said parts being in the form which they preferably take when prepared for assembly;

Fig. 3 is similar to Fig. 1 but shows the parts of the valve assembled and in the form which they may take after the first operation in connecting them; and

Fig. 4 is a similar view of the completed valve.

The valve stem 10 and the central or body portion 11 of the head may be produced, in the form illustrated in Fig. 1, in any convenient manner, as by forming the said two parts in one piece from an integral stem rod, by upsetting the head portion upon the end of the stem in a suitable forging press (not shown). l/Vhen so formed the head portion 11 will he produced between the dies of the The part 19 (Fig. 2), employedto provide the rim or seating portion of the completed valve, is preferably a stamping produced from the selected material insheet form. As shown, this part has a central aperture 20, designed to receive the valve stem 10, an inner sloping portion 21, and an intermediate sloping portion 22, the two lastmentioned parts being shaped to conform, respectively, with the sloping under side 12 of the valve head portion 11 and with its beveled edge 13. The part 19 also has an upstanding flange 23. l

,Vhen the part 19- has been threaded upon the stem 10, with its said inner and inter.- mediate portions engaged with the under side and beveled edge of the head portion 11, and its flange 23 extending upwardly about the rilnlT, that part of the stem just under the head is heated and upset by cndwise pressure to produce the enlargement of the stem shown at 21 (Fig. The sloping inner portion 21 of the sheet metal part 19 is thus firmly pinched or gripped between the said enlargement and thesloping underside 12 of the head portion 11.

in the next operation .the upstanding flange 23 of the sheet metal part 19 is folded inwardly upon the sloping rim 17 of the head portion 11. At the same time, or immediately thereafter, and while the inwardly folded flange 23 is held in a die (not shown), the cupped face 14 of the head is flattened, pressing the rib 15 obliquely outward and downward and forcing the outwardly fare ing shoulder 16 into intimate contact with the edge of the flange 23 andgiving said shoulder an undercut form. The valve now has the form illustrated in Fig. 4, the edge of the flange 23 being preferably chamfered, and the rib 15 sloping outwardly over the said chamfered edge of the flange, whereby the flange is firmly held in place, and in the co-mpletd aitticl'e, the 'part i9 in the to rin of a'tlitthifel. f

It Will thus be seen that a composite valve pfddue'e'dlin ecco1-de11ee with the invention I has its parts permanently.connectedfiandiso associated that their separation in service is impossible; Lil'r evxrise the sheet metal 111111 '7 "19 is so positioned in the finished valve that I 1 the formation of thispal'tfrdma hardnon- '10 corrosive allpysteel produces. a yalve of great b lity withon't the 1 use of expensive ial 'lotli'er pat-11 m; v Fiii'thermoife, "so -iiiatferial is" i eqiiired f o'r the said hee:

tjliifei 11 "will not the we I e a fgreetl' inet'e'ase the cost- 61? insten pliii g flange extending under thehea'd 5511 the ai'd"'iilargement' on "the a r 1 t of Y a poppetfvelveibf continuous rim van; "ed i th "'ttorm efn channel if m 111'wa1 11 ever ohi'fidsit (poppet valve eempri-sine, h I at'ion, en ally'it'ormed head 'j' dws enf-i yitlr-an enlar ement on the stem "if lieadwaiidl antitityvardly f'ac'ing enntiler "shonlderbn' the face of the head heti'r' theperiphery'thereof; land a rim havstanding anges one ektending over the herjeiitend fng{*iiiiderthe head and beihg fi rmlyipe betweenthe 'itnderside tha enlargement epset on the 1 of the head and the said "nlaegment on thest'em.

5. The method of making a composite poppet "valve which consists i in assembling-a fcentrally. ap'ertured cup With an integrally formed stem and head portion by threadin th'ecup npon thestemt'o receive the head portion Within the cup, and then upsetting the "stern finder the head to produce an enlargement thereon between which and the underside of the "head poitionthe bottoin of the cup is "firmly gripped.

The Tinethod "of makin a "composite poppet valve which consists -111-a'ss-emi51i11 an integrally formed {head body "and stem with acenti'aIIy apeitured mip Which-is deeper than the thickness'ofthe "head body at its rim, bytlireading the cup upon the stem to receive; the head body Within the cup, upsetting the stern 't'l nd'er-' the'l1eadto plod'n'ce {an enlargement thereon between which and the underside of the head body the bottom of the clip is "firmly ipped, and folding the rim of-the-cnp-iifivi-rdly over the margin "of theh'ead body.

*7. The method of *mttking"a"composite poppet valve which consists in "assembling an "integrall lfornied 'hea-d body and stem with a centrally "apertured 'cnp "which is deeper than the thickness *of' the hea-d bddy atits-rim, by threading the cup upon the stemtore'ceive the head "bodyxvithint'he 'cup and 'fol'ding' the r-iin otthe cup inwardly over the margin of the "head body.

8. A composite poppetwalve con-"q'a'rising. in combination, an integrally formeddiead and stem With an enlargement" on the stem u iider the head and a n dut-Waidly rating undercutan-nn'larshoulder' on the face of the head'near the periphery thereof; and a sheet metal rim having instand-ing flanges one having a chemfer'ededg-e 51nd extending 'over the margin of the headflW-i'th itschani fered edge interlocked with the s'aid outwardly facing under'cntsh'oulder on"the"face of the head andthe othei extending tinder the head end being firmly gripped'between tl1e"i1nderside of "the -hea-dand-the said"enhirgeinenl on the stem.

ROBERT J'ARDINE. 

